Hi we have mercury as a SMTP gateway server between our router and our exchange server. I had mercury setup with no ESMTP maximum message size limit so it was passing big emails over 10mb to exchange 10mb being the limit on our exchange server. When mercury tried to deliver say a 25mb email to exchange I saw a failure in the ESMTP log but the sender gets no bounceback so they just seem to black hole. Is there a way to get mercury to send bounceback when the S SMTP server has recieved the mail ok but the E SMTP server cannot deliver it to exchange?
At the minute I have set Mercury S SMTP server to reject all mail over 10mb to stop this happening but we might want to setup a mailbox on exchange for large mail and if I do that I will have to get rid of the limit on mercury.
Thanks Graham